The attachment, which carries the official Nintendo seal and will cost ¥1,280 ($17), snaps onto the back of the handheld to give players who use the game's tilt-to-steer functionality a greater sense of ... realism? We guess? All we know is that it better come with a fanny pack to carry around its unwieldy frame, and then some sort of invisibility cloak to protect the wearer from being savagely beaten by everyone who sees them.